I can confirm this bug. As an observation, I get the same glitches in Gnome-shell, while in a normal desktop session, mutter runs flawless. (Same graphic card as original poster)
-- Major rendering issues using ATI Mobility Radeon HD 3450 https://bugs.launchpad.net/bugs/599741 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs